Miscellaneous spelling corrections.

fixes #4625
Merge pull request #314 from marklocker/3.2/develop

Miscellaneous spelling corrections. (refs #4625)
Merge remote-tracking branch 'origin/3.2/develop' into 3.3/develop (refs #4625)

Conflicts:
	classes/Kohana/Request/Client/Curl.php
	classes/Kohana/Route.php
	classes/kohana/http/cache.php